成果報告書詳細
管理番号20110000001083
タイトル*平成22年度中間年報 高分子膜モジュールを用いたセルロース系バイオエタノール濃縮・膜脱水システムの研究開発
公開日2011/7/28
報告書年度2010 - 2010
委託先名日東電工株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:1.高耐久性高分子膜モジュールの研究開発 本事業で研究開発を進めている脱水用高分子膜モジュールの構造を図1に示す。モジュール構造はスパイラル型と呼ばれるもので平膜シートをのり巻き状に加工したものである。 (a)最適部材の選定と実証 これまでの部材スクリーニングの結果、不織布部材にP系材料、透過側・供給側ガススペーサーにP系またはE系材料が、接着層にS系材料が使用できる目途がたった。23年度では接着層の耐久性を更に向上を目指し、更なる部材スクリーニングの継続を行う。
英文要約1. Summary
The main purpose of this project is to develop an epoch-making production system of bio-ethanol, to which a novel polymer membrane method is applied, we will achieve energy-saving in concentrating the bio-ethanol in the dehydration system and the cost-reduction for the bio-ethanol production cost.
As a concrete goal, energy consumption in the concentration and dehydration process shall be below 2.5MJ/L and the initial cost of the dehydration which relates to the membrane module shall be cut down by 50% reduction against the present ceramic membrane cost.
Presently, we are trying to achieve the goal, conducting research and development for the polymer membrane module at low cost.
Furthermore, we pursue to develop the energy-saving type concentration and dehydration system which combines the membrane dehydration equipment of the polymer membrane module with the distillation tower.
In addition, the research and development regarding prediction and prevention of system problems for the membrane dehydration system by the impurity which occurs with various bio-ethanol manufacturing processes and the prevention are also done.
The polymer membrane module for dehydration has been produced for trial purposes, so far. The evaluation of the trial production module with using the module evaluation equipment that had been introduced in this year was begun.
As for the research and development of the energy-saving type concentration- dehydration system, it was confirmed by our simulation that the project target value of 2.5 MJ/L which is the required energy consumption to concentrate ethanol from 10wt% to 99.7wt% was almost achieved.
As for the research and development of the prediction and prevention of system problems for the membrane dehydration, we surveyed the contaminants produced in each step of ethanol production process. Among these steps, the major contaminants assumed to be produced from biomass pre-treatment, nutrients, and fermentation process. A dilute sulffic acid and alkali method was chosen as biomass pre-treatment process for straws of rice, wheat, and switchgrass. By the dilute sulffic acid, candidate contaminants such as acetate and formate were produced at 18-32 mM and 16-25mM, respectively. Other contaminants were surveyed using GC-MS profiling analysis, by which 35 impurities in the fermentation liquids have been identified. The pretreated liquids (4 L in total) and the fermentation liquids (2 L in total) have been prepared for the membrane test from the lignocellosic biomass including rice, wheat, and switchgrass.
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